Finding the Fourth Proportional to 10,123.05, 15,180.15 and 5,378.17

Step by Step Solution

1. Step 1: Write the proportion equation
   10,123.05 : 15,180.15 = 5,378.17 : x
2. Step 2: Convert to fraction form
   10,123.05/15,180.15 = 5,378.17/x
3. Step 3: Cross multiply
   10,123.05x = 15,180.15 × 5,378.17
4. Step 4: Simplify right side
   10,123.05x = 81,641,427.33
5. Step 5: Solve for x
   x = 81,641,427.33/10,123.05
6. Step 6: Final answer
   x = 8,064.90